Automatic detection feeding device

Abstract

The utility model discloses an automatic detection feeding device which comprises a rack, a storage rack, a collection rack, a conveying mechanism, a limiting assembly, a length measuring mechanism and a diameter measuring mechanism, the storage rack and the collection rack are located on the two sides of the rack respectively, the limiting assembly is installed at the discharging end of the storage rack, the conveying mechanism is arranged on the rack, and the length measuring mechanism is arranged on the collection rack. Comprising a first roller assembly, a second roller assembly, a lifting assembly and a defective product collecting assembly movably connected with the lifting assembly, a length measuring mechanism and a diameter measuring mechanism are installed on a rack and located at the two ends of the first roller assembly, and the lifting assembly lifts and moves a workpiece on a limiting assembly to the first roller assembly; the length measuring mechanism pushes the workpiece to abut against the diameter measuring mechanism to stop, the length measuring mechanism and the diameter measuring mechanism detect and judge the quality, the defective product is conveyed to the collecting position or the next machining procedure through the defective product collecting assembly or the second roller assembly, and the automation degree is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece conveying devices, in particular to an automatic detection feeding device. Background Art

[0002] Workpiece conveying is an important link connecting various production links. The feeding device can transfer the workpiece from one processing area to another to ensure the smooth progress of the production process. The existing workpiece conveying device has a low degree of automation, and often requires a lot of manual intervention in key links such as workpiece handling and measurement. This not only increases labor costs, but also easily leads to operational errors due to human factors, affecting production progress and product quality. In addition, the existing devices lack the function of automatically judging whether the workpiece is qualified, and cannot quickly and accurately screen out unqualified products. It is easy to mix unqualified workpieces with qualified products, affecting the yield of the finished product. Most of them do not have a defective product collection function, and cannot effectively collect and place unqualified workpieces in the defective product area. Production efficiency and product quality cannot be guaranteed. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an automatic detection feeding device, which aims to solve the technical problems that the feeding device in the existing technology cannot automatically detect whether the incoming materials are qualified and has a low degree of automation.

[0005] (2) Technical solution

[0006] The utility model provides an automatic detection and feeding device, comprising a frame, a storage rack, a collection rack, a conveying mechanism, a limit assembly, a length measuring mechanism and a diameter measuring mechanism, the storage rack and the collection rack are respectively located on both sides of the frame, the limit assembly is installed at the unloading end of the storage rack, the conveying mechanism is arranged on the frame, and comprises a first roller assembly for placing a measured workpiece, a second roller assembly for conveying the workpiece, a lifting assembly for adjusting the position of the workpiece and a defective product collection assembly movably connected to the lifting assembly, the length measuring mechanism and the diameter measuring mechanism are installed on the frame and are located at both ends of the first roller assembly, and the length measuring mechanism can push one end of the workpiece on the first roller assembly along the frame to move toward a direction close to the diameter measuring mechanism.

[0007] Preferably, the height of the side of the storage rack away from the frame is higher than the height of the side of the storage rack close to the frame.

[0008] Preferably, an automatic detection and feeding device according to the claim is characterized in that: the limit assembly includes a limit driving part, a limit slide rail fixed on the frame, a limit slider slidably installed on the limit slide rail, a receiving plate fixedly installed on the limit slider, and a baffle fixed on the receiving plate away from the end of the storage rack, the receiving plate is arranged relatively parallel to the unloading end of the storage rack, and the output end of the limit driving part is connected to the receiving plate.

[0009] Preferably, the lifting assembly includes a first lifting drive member, a first lifting plate, a second lifting drive member and a second lifting plate, the first lifting plate includes a first lifting slope and a second lifting slope, the relatively higher end of the first lifting slope corresponds to the blocking position of the limiting assembly, and the relatively lower end corresponds to the discharging position of the first roller assembly, the first roller assembly is provided with a first stop block at the end away from the limiting assembly, the relatively higher end of the second lifting slope corresponds to the discharging position of the first roller assembly, and the relatively lower end of the second lifting slope corresponds to the second lifting plate or the defective product collection assembly.

[0010] Preferably, the plane height where the highest point of the first roller assembly in contact with the workpiece is located is higher than the plane height where the highest point of the second roller assembly in contact with the workpiece is located.

[0011] Preferably, the second lifting plate includes a material receiving surface arranged corresponding to the material discharge position of the second roller assembly and a second stopper arranged corresponding to one end of the second roller assembly away from the first roller assembly.

[0012] Preferably, the defective product collection assembly includes a collection drive cylinder, a connecting piece with one end connected to the output end of the collection drive cylinder, a rotating shaft axially connected to the other end of the connecting piece, and a connecting inclined plate fixedly connected to the rotating shaft, and the connecting inclined plate is arranged above the collection rack at one end away from the second lifting inclined surface.

[0013] Preferably, the length measuring mechanism includes a support frame arranged at one end of the first roller assembly, a length driving cylinder, a push block installed at the output end of the length driving cylinder, a length guide rail arranged corresponding to the first roller assembly, and a limit sensing plate arranged at the other end of the first roller assembly. The push block is slidably installed on the length guide rail, and the support frame is provided with a magnetic scale for detecting the movement distance of the push block.

[0014] Preferably, the diameter measuring mechanism includes a measuring pressure block provided at the other end of the first roller assembly relative to the length measuring mechanism and a diameter driving member for driving the measuring pressure block to rise and fall, and the measuring pressure block is provided above the first roller assembly.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] When the workpiece is unloaded from the storage rack and enters the top of the frame, it is blocked and restricted by the limit assembly. The lifting assembly lifts the single workpiece on the limit assembly and moves it to the first roller assembly. The length measuring mechanism located at one end of the first roller assembly pushes the workpiece to move on the first roller assembly until the other end of the workpiece abuts the diameter measuring mechanism and stops pushing. The length measuring mechanism can obtain the length data of the workpiece according to the pushing distance, and the diameter measuring mechanism measures the diameter of the workpiece it contacts to obtain the pipe diameter data of the workpiece. The length data and pipe diameter data of the workpiece are compared with the relevant data of qualified products to determine whether the workpiece is qualified. If it is unqualified, the lifting mechanism lifts the workpiece to the defective product collection assembly, and the defective product collection assembly collects the unqualified products. If it is qualified, the lifting mechanism lifts the workpiece to the second roller assembly, and at the same time the defective product collection assembly rotates to avoid position, so that the qualified workpiece is transported to the next processing step by the second roller assembly, with a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 This is a partial structural diagram of one end of the frame of the present invention.

[0021] Figure 4 for Figure 3 Half-section of the middle structure.

[0022] Figure 5 This is another perspective view of the partial structure of one end of the frame of the present invention.

[0023] Figure 6 This is a partial structural diagram of the other end of the frame of the present invention.

[0024] The markings of the components in the accompanying drawings are as follows:

[0025] 1. Frame; 2. Storage rack; 3. Limiting assembly; 31. Limiting drive; 32. Limiting slide rail; 33. Limiting slider; 34. Attaching plate; 35. Baffle; 4. Lifting assembly; 41. First lifting drive; 42. First lifting plate; 421. First lifting slope; 422. Second lifting slope; 43. Second lifting drive; 44. Second lifting plate; 441. Material receiving surface; 442. Second stopper; 5. A roller assembly; 51. A first stopper; 6. A second roller assembly; 7. A defective product collecting assembly; 71. A collecting drive cylinder; 72. A connecting piece; 73. A rotating shaft; 74. A connecting inclined plate; 75. A collecting rack; 8. A length measuring mechanism; 81. A supporting frame; 82. A length driving cylinder; 83. A pushing block; 84. A length guide rail; 9. A diameter measuring mechanism; 91. A limit sensor plate; 92. A measuring pressure block; 93. A diameter driving piece. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. For the sake of clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. In addition, to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0027] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in this application, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit this application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0030] See also Figure 1-6 The utility model provides an automatic detection and feeding device, including a frame 1, a storage rack 2, a collection rack 75, a conveying mechanism, a limit assembly 3, a length measuring mechanism 8 and a diameter measuring mechanism 9, characterized in that: the storage rack 2 and the collection rack 75 are respectively located on both sides of the frame 1, the limit assembly 3 is installed at the unloading end of the storage rack 2, the conveying mechanism is arranged on the frame 1, and includes a first roller assembly 5 for placing the measured workpiece, a second roller assembly 6 for conveying the workpiece, a lifting assembly 4 for adjusting the position of the workpiece and a defective product collection assembly 7 movably connected to the lifting assembly 4, the length measuring mechanism 8 and the diameter measuring mechanism 9 are installed on the frame 1 at both ends of the first roller assembly 5, and the length measuring mechanism 8 can push one end of the workpiece on the first roller assembly 5 along the frame 1 to move toward the direction close to the diameter measuring mechanism 9.

[0031] When the workpiece is loaded and unloaded from the storage rack 2 and enters the top of the frame 1, it is blocked and restricted by the limit assembly 3. The lifting assembly 4 lifts the single workpiece on the limit assembly 3 and moves it to the first roller assembly 5. The length measuring mechanism 8 located at one end of the first roller assembly 5 pushes the workpiece to move on the first roller assembly 5 until the other end of the workpiece abuts the diameter measuring mechanism 9 and stops pushing. The length measuring mechanism 8 can obtain the length data of the workpiece according to the pushing distance, and the diameter measuring mechanism 9 measures the diameter of the workpiece it contacts to obtain the pipe diameter data of the workpiece. The length data and pipe diameter data of the workpiece are compared with the relevant data of qualified products to determine whether the workpiece is qualified. If it is unqualified, the lifting mechanism lifts the workpiece to the defective product collection assembly 7, and the defective product collection assembly 7 collects the unqualified products on the collection rack 75. If it is qualified, the lifting mechanism lifts the workpiece to the second roller assembly 6, and at the same time the defective product collection assembly 7 rotates to avoid position, so that the qualified workpiece is transported to the next processing step by the second roller assembly 6, with a high degree of automation.

[0032] like Figure 3 and Figure 5 As shown, in the embodiment of the present invention, the height of the side of the storage rack 2 away from the frame 1 is higher than the height of the side of the storage rack 2 close to the frame 1, that is, the upper surface of the storage rack 2 in contact with the workpiece is an inclined surface. When multiple workpieces are placed on the storage rack 2, the workpieces are automatically gathered on the side close to the unloading end of the storage rack 2 due to the angle of the inclined surface and the influence of their own gravity factors, and the limit component 3 blocks and limits the workpieces with a downward movement tendency. When the material on the limit component 3 is removed by the lifting mechanism, the workpieces on the storage rack 2 can also be automatically replenished, further improving the degree of automation.

[0033] like Figure 6As shown, there is an overlapping length between the limit assembly 3 and the unloading end of the storage rack 2 in the embodiment of the present invention. When the limit assembly 3 blocks the material, in order to facilitate the movement of the lifting mechanism on a single workpiece, the limit assembly 3 limits the number of workpieces stored above it to one. Therefore, the overlapping length between the limit assembly 3 and the unloading end of the storage rack 2 is the diameter of a single batch of workpieces. In order to adapt to the use of workpieces of multiple specifications with different diameters, the overlapping length between the limit assembly 3 and the unloading end of the storage rack 2 is adjustable, that is, the limit assembly 3 is movable. Specifically, the limit assembly 3 includes a limit drive member 31, a member fixed to the machine The limiting slide rail 32 on the rack 1, the limiting slider 33 slidably mounted on the limiting slide rail 32, the receiving plate 34 fixedly mounted on the limiting slider 33, and the limiting baffle 35 fixed on the receiving plate 34 at the end away from the storage rack 2, the receiving plate 34 is arranged relatively parallel to the unloading end of the storage rack 2, the output end of the limiting driving component 31 is connected to the receiving plate 34, the limiting driving component 31 drives the receiving plate 34 to move and then drives the limiting slider 33 to slide on the limiting slide rail 32. In actual use, the overlapping length of the receiving plate 34 and the unloading end of the storage rack 2 can be determined according to the specifications of the workpiece.

[0034] like Figure 2-4 As shown, the lifting assembly 4 in the embodiment of the present invention includes a first lifting drive member 41, a first lifting plate 42, a second lifting drive member 43 and a second lifting plate 44. The first lifting plate 42 includes a first lifting inclined surface 421 and a second lifting inclined surface 422. The relatively higher end of the first lifting inclined surface 421 corresponds to the blocking position of the limit assembly 3, and the relatively lower end corresponds to the discharge position of the first roller assembly 5. The first roller assembly 5 is provided with a first stopper 51 at one end away from the limit assembly 3. The relatively higher end of the second lifting inclined surface 422 corresponds to the first roller assembly The discharge position of 5 can be understood as follows: the discharge position of the first roller assembly 5 is at the connection position of the first lifting inclined surface 421 and the second lifting inclined surface 422 relative to the midpoint position, and a step structure with a height difference is formed between the two inclined surfaces. The relatively lower end of the second lifting inclined surface 422 corresponds to the second lifting plate 44 or the defective product collecting assembly 7, that is, through the lifting and lowering movement of the second lifting plate 44 and the movement of the defective product collecting assembly 7, either one of the two is adjacent to the relatively lower end of the second lifting plate 44, thereby corresponding to the next moving direction of the workpiece being a qualified product or a defective product respectively;

[0035] When the workpiece on the limit assembly 3 needs to be moved to the first roller assembly 5, the first driving member drives the first lifting plate 42 to lift upward so that the first lifting inclined surface 421 lifts the single workpiece on the limit assembly 3 to pass over the limit baffle 35 on the limit assembly 3, and the workpiece is moved toward the direction of the discharge position on the first roller assembly 5 through the influence of the inclined surface and the gravity of the workpiece itself, until the workpiece moves to the stepped position where the first lifting inclined surface 421 and the second lifting inclined surface 422 are connected, and is blocked by the lifting height of the second lifting inclined surface 422. At this time, the first lifting driving member 41 drives the first lifting plate 4 2 moves downward until the overall height is lower than the highest horizontal surface of the contact between the first roller assembly 5 and the workpiece, so that the workpiece further rolls to the discharge position of the first roller assembly 5 under the action of inertia, and is limited by the first stopper 51 to move in a direction away from the discharge position. After the length measuring mechanism 8 and the diameter measuring mechanism 9 measure and determine whether the workpiece is qualified, the first lifting drive member 41 drives the first lifting plate 42 to lift upward again, so that the second lifting inclined surface 422 lifts the workpiece from the first roller assembly 5, and moves in a direction away from the first roller assembly 5 under the influence of the inclined surface and the workpiece itself.

[0036] In the embodiment of the utility model, the plane height where the highest point of contact between the first roller assembly 5 and the workpiece is located is higher than the plane height where the highest point of contact between the second roller assembly 6 and the workpiece is located. Since the defective product collection assembly 7 needs to be movably connected adjacent to one end of the first lifting plate 42, the second roller assembly 6 is set at a relatively low height, thereby playing a role of avoiding the defective product collection assembly 7. Of course, in some other embodiments, the plane height where the highest point of contact between the first roller assembly 5 and the workpiece can also be set to be lower than the plane height where the highest point of contact between the second roller assembly 6 and the workpiece. It can also be implemented by some common technical means of those skilled in the art, and no specific analysis is made here.

[0037] like Figure 2-5As shown, the second lifting plate 44 in the embodiment of the present invention includes a material receiving surface 441 arranged at the material discharge position of the second roller assembly 6 and a second stopper 442 arranged at one end of the second roller assembly 6 away from the first roller assembly 5. When the workpiece is determined to be qualified material, the defective collection assembly 7 moves to avoid the position, and the second lifting driving member 43 drives the second lifting plate 44 to lift upward so that the material receiving surface 441 is relatively flush with the end of the second lifting inclined surface 422 when the first lifting plate 42 is lifted, so that the workpiece is lifted from the first roller assembly 5 by the second lifting inclined surface 422 and rolls along the inclined surface. When moving, the material receiving surface 441 plays a supporting role for the workpiece, and the second stop block 442 limits the movement of the workpiece, and then the second lifting drive member 43 drives the second lifting plate 44 to move downward until the material receiving surface 441 of the second lifting plate 44 is lower than the highest plane height of the contact between the second roller assembly 6 and the workpiece, that is, the workpiece is conveyed to the second roller assembly 6 and conveyed to the next process through the second roller assembly 6. The driving method or related structure of the workpiece on the second roller assembly 6 is not shown in the figure. Its driving principle is easy for technicians in this field to think of, and it is not described in detail here.

[0038] like Figure 1 As shown, the defective product collection component 7 in the present invention includes a collection drive cylinder 71, a connecting member 72 connected to the output end of the collection drive cylinder 71 at one end, a rotating shaft 73 axially connected to the other end of the connecting member 72, and a connecting inclined plate 74 fixedly connected to the rotating shaft 73. The connecting inclined plate 74 is arranged above the collection rack 75 at one end away from the second lifting inclined surface 422, and the connecting inclined plate 74 is rotatably installed. When it is necessary to collect defective products, the collection drive cylinder 71 drives the rotating shaft 73 to rotate through the connecting member 72, so that the connecting inclined plate 74 fixed on the rotating shaft 73 swings to one end of which is arranged corresponding to one end of the first roller assembly 5, and the other end of the connecting inclined plate 74 corresponds to the collection rack 75. When the first lifting plate 42 lifts the workpiece from the first roller assembly 5, the pipe can roll along the connecting inclined plate 74 to the collection rack 75 to complete the defective product collection operation.

[0039] like Figure 6As shown, the length measuring mechanism 8 in the embodiment of the present invention includes a support frame 81 arranged at one end of the first roller assembly 5, a length driving cylinder 82, a push block 83 installed at the output end of the length driving cylinder 82, a length guide rail 84 arranged corresponding to the first roller assembly 5, and a limit sensing plate 91 arranged at the other end of the first roller assembly 5. The push block 83 is slidably mounted on the length guide rail 84, and the support frame 81 is provided with a magnetic scale (not shown in the figure) for detecting the movement distance of the push block 83. When the workpiece is placed on the first roller assembly 5, the length driving cylinder 82 drives the push block 83 to slide on the length guide rail 84, and the push block 83 abuts and pushes one end of the workpiece until the other end of the workpiece abuts against the limit sensing plate 91, and the length driving cylinder 82 stops working. After the diameter measuring mechanism 9 completes the measurement, the push block 83 is reset under the drive of the length driving cylinder 82 and can wait to repeat the operation on the next workpiece.

[0040] like Figure 3 and Figure 5 As shown, the diameter measuring mechanism 9 in the embodiment of the present invention includes a measuring pressure block 92 arranged at the other end of the first roller assembly 5 relative to the length measuring mechanism 8 and a diameter driving member 93 for driving the measuring pressure block 92 to rise and fall. The measuring pressure block 92 is arranged above the first roller assembly 5. When one end of the workpiece is pushed by the length measuring mechanism 8 until the other end of the workpiece abuts the limit sensing plate 91, the length measuring mechanism 8 stops pushing, and then the diameter driving member 93 drives the measuring pressure block 92 to press down to measure the diameter of the workpiece. In this process, the two ends of the workpiece are respectively clamped by the limit sensing plate 91 and the push block 83 on the length measuring mechanism 8, so that the downward pressure of the measuring pressure block 92 will not cause the workpiece to roll, thereby avoiding large errors in the diameter measurement data.

[0041] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application fall within the scope of the technical solution of the present application.

Claims

1. An automatic detection and feeding device, comprising a frame (1), a storage rack (2), a collecting rack (75), a conveying mechanism, a limit assembly (3), a length measuring mechanism (8) and a diameter measuring mechanism (9), characterized in that: The storage rack (2) and the collection rack (75) are respectively located on both sides of the frame (1); the limiting assembly (3) is installed at the unloading end of the storage rack (2); the conveying mechanism is arranged on the frame (1), and includes a first roller assembly (5) for placing the workpiece for measurement, a second roller assembly (6) for conveying the workpiece, a lifting assembly (4) for adjusting the position of the workpiece, and a defective product collection assembly (7) movably connected to the lifting assembly (4); the length measuring mechanism (8) and the diameter measuring mechanism (9) are installed on the frame (1) and located at both ends of the first roller assembly (5); the length measuring mechanism (8) can push one end of the workpiece on the first roller assembly (5) along the frame (1) to move toward the direction close to the diameter measuring mechanism (9).

2. The automatic detection and feeding device according to claim 1, characterized in that: The height of the side of the material storage rack (2) away from the frame (1) is higher than the height of the side of the material storage rack (2) close to the frame (1).

3. The automatic detection and feeding device according to claim 1, characterized in that: The limiting assembly (3) comprises a limiting driving member (31), a limiting slide rail (32) fixed on the frame (1), a limiting slider (33) slidably mounted on the limiting slide rail (32), a receiving plate (34) fixedly mounted on the limiting slider (33), and a baffle (35) fixed on the receiving plate (34) at one end away from the storage rack (2); the receiving plate (34) is arranged relatively parallel to the unloading end of the storage rack (2); and the output end of the limiting driving member (31) is connected to the receiving plate (34).

4. The automatic detection and feeding device according to claim 1, characterized in that: The lifting assembly (4) comprises a first lifting drive member (41), a first lifting plate (42), a second lifting drive member (43) and a second lifting plate (44); the first lifting plate (42) comprises a first lifting slope (421) and a second lifting slope (422); the end of the first lifting slope (421) with a relatively higher height corresponds to the material blocking position of the limiting assembly (3), and the other end with a relatively lower height corresponds to the material discharging position of the first roller assembly (5); the end of the first roller assembly (5) away from the limiting assembly (3) is provided with a first stopper (51); the end of the second lifting slope (422) with a relatively higher height corresponds to the material discharging position of the first roller assembly (5), and the end of the second lifting slope (422) with a relatively lower height corresponds to the second lifting plate (44) or the defective product collecting assembly (7).

5. The automatic detection and feeding device according to claim 4, characterized in that: The plane height where the highest point of the first roller assembly (5) in contact with the workpiece is located is higher than the plane height where the highest point of the second roller assembly (6) in contact with the workpiece is located.

6. The automatic detection and feeding device according to claim 4, characterized in that: The second lifting plate (44) comprises a material receiving surface (441) arranged corresponding to the material discharge position of the second roller assembly (6) and a second stopper (442) arranged corresponding to one end of the second roller assembly (6) away from the first roller assembly (5).

7. The automatic detection and feeding device according to claim 4, characterized in that: The defective product collection assembly (7) comprises a collection drive cylinder (71), a connector (72) having one end connected to the output end of the collection drive cylinder (71), a rotating shaft (73) axially connected to the other end of the connector (72), and a connecting inclined plate (74) fixedly connected to the rotating shaft (73), wherein the connecting inclined plate (74) is arranged above the collection rack (75) at one end away from the second lifting inclined surface (422).

8. The automatic detection and feeding device according to claim 1, characterized in that: The length measuring mechanism (8) comprises a support frame (81) arranged at one end of the first roller assembly (5), a length driving cylinder (82), a push block (83) installed at the output end of the length driving cylinder (82), a length guide rail (84) arranged corresponding to the first roller assembly (5), and a limit sensing plate (91) arranged at the other end of the first roller assembly (5); the push block (83) is slidably mounted on the length guide rail (84); and a magnetic scale for detecting the moving distance of the push block (83) is provided on the support frame (81).

9. The automatic detection and feeding device according to claim 8, characterized in that: The diameter measuring mechanism (9) comprises a measuring pressure block (92) arranged at the other end of the first roller assembly (5) and a diameter driving member (93) for driving the measuring pressure block (92) to rise and fall, and the measuring pressure block (92) is arranged above the first roller assembly (5).

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